Steam oxygenating step-down pressure blowing system and method for boiler
A pipe system and boiler technology, which is applied in the field of boiler steam oxygenation and depressurization blowpipe system, can solve the problems of many blowpipe times, long blowpipe time, large consumption of fuel and desalted water, etc., and achieve less blowpipe times and less time spent , The effect of reducing the amount of fuel and the amount of desalinated water
Pending Publication Date: 2019-12-24
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the problems of many blowing times, long blowing time, and large consumption of fuel and desalinated water in the existing boiler pressure-reducing blowpipe and steady-pressure blowpipe
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features; in the description of the present invention, unless otherwise specified, "multiple", "several" " means two or more.
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The invention provides a steam oxygenating step-down pressure blowing system and method for a boiler. The steam oxygenating step-down pressure blowing system comprises a super-heater unit and a reheater unit, wherein an oxygenating pipeline I is connected to an inlet header pipeline of a roof superheater of the super-heater unit; an oxygenating pipeline II is connected to an outlet header connecting pipe of a vertical low temperature superheater; an oxygenating pipeline III is connected with an outlet header connecting pipe of a platen superheater; the oxygenating pipeline I, the oxygenating pipeline II and the oxygenating pipeline III are connected with first oxygen storage devices through a first oxygenating mother pipe; an inlet header nitrogen filling interface of a low temperature reheater of the reheater unit is connected with an oxygenating pipeline IV; an inlet header of a high temperature reheater is connected with an oxygenating pipeline V; and the oxygenating pipeline IV andthe oxygenating pipeline V are connected with second oxygen storage devices through a second oxygenating mother pipe. According to the steam oxygenating step-down pressure blowing system and the method, by reasonably selecting connecting points of a temporary oxygenating system pipeline and boiler heated surfaces, dense protective films are formed on all the heated surfaces of the boiler and metal surface of the inner wall of a steam pipeline; blowing times are few, and the consumed time is short; and a chemical cleaning procedure of the boiler is omitted, so that the cost is reduced.
Description
technical field [0001] The invention belongs to the technical field of steam purging of boiler pipes, and in particular relates to a boiler steam oxygenation and depressurization blowing system and method. Background technique [0002] Boiler pipe steam purging is an important project of unit infrastructure commissioning. Its purpose is to use the kinetic energy generated by steam to remove debris and rust remaining in the superheater system, reheater system, and steam pipes during transportation, storage, and installation. Ensure safe and economical operation of boiler units. At present, there are generally two methods of steam blowing for boilers: depressurization steam blowing and constant pressure steam blowing. [0003] The pressure-reducing blowpipe means that when the boiler’s temporary blowing door is closed, when the outlet pressure of the boiler superheater reaches the pressure value in the blowing pipe scheme, the temporary blowing door is opened, and a large amo...
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IPC IPC(8): F28G1/16F28G15/00F28F19/00
CPCF28F19/00F28G1/163F28G15/003
Inventor 刘向东江欢欢邵启芳王栋
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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